Thanks Carter. I had a heck of a time getting that inner piece section off that seals up the speaker chamber. It was nearly like it was cemented in. It sounds super with my '68 Kustom 2-15 cab and matching Kustom head. Amazing how 100 watts can sound through the folded horn along with the 2-15. You know me, I love vintage gear, and the X1-18B is another jewel in the stable.